Effects of BRB on cyclic behavior of resilient RAC composite frames with ultra-high strength steel bars

IF 5.6 1区工程技术 Q1 ENGINEERING, CIVIL

Engineering Structures Pub Date : 2025-03-18 DOI:10.1016/j.engstruct.2025.120059

Jianwei Zhang, Weiheng Liu, Man Zhang, Yuyang Long

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Abstract

Quasi-static tests were conducted to investigate the effects of buckling restrained braces (BRB) on the seismic performance of resilient recycled aggregate concrete (RAC) composite frames with ultra-high strength steel bars (UHSB). The damage processes, hysteretic characteristics, stiffness and strength degradation, energy dissipation capacity, strain development of steel, residual drifts and residual crack widths of specimens were analyzed. Overall, the effects of BRB on the crack propagation of specimens were minor, both of which exhibited a beam hinge failure mechanism. After setting BRB, the damage to RAC was reduced within the range of gusset plates, and the spalling area of RAC in columns was significantly diminished. When the horizontal drift reached 1.5 %, the stiffness, bearing capacity and energy dissipation capacity were increased by 102 %, 66 % and 186 %, respectively. Moreover, the residual drift was slightly larger, but the residual crack width remained invariable. Considering the weak bonding property of UHSB and fractures of BRB, finite element models of specimens were established. The simulated results indicated that as the stiffness ratios and BRB area ratios increased, the peak bearing capacity of specimens improved. It was recommended that the stiffness ratios and BRB area ratios should be within the range of 0.50–2.00 and 0.50–1.00, respectively.

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来源期刊

Engineering Structures 工程技术-工程：土木

CiteScore

10.20

自引率

14.50%

发文量

1385

审稿时长

67 days

期刊介绍： Engineering Structures provides a forum for a broad blend of scientific and technical papers to reflect the evolving needs of the structural engineering and structural mechanics communities. Particularly welcome are contributions dealing with applications of structural engineering and mechanics principles in all areas of technology. The journal aspires to a broad and integrated coverage of the effects of dynamic loadings and of the modelling techniques whereby the structural response to these loadings may be computed. The scope of Engineering Structures encompasses, but is not restricted to, the following areas: infrastructure engineering; earthquake engineering; structure-fluid-soil interaction; wind engineering; fire engineering; blast engineering; structural reliability/stability; life assessment/integrity; structural health monitoring; multi-hazard engineering; structural dynamics; optimization; expert systems; experimental modelling; performance-based design; multiscale analysis; value engineering. Topics of interest include: tall buildings; innovative structures; environmentally responsive structures; bridges; stadiums; commercial and public buildings; transmission towers; television and telecommunication masts; foldable structures; cooling towers; plates and shells; suspension structures; protective structures; smart structures; nuclear reactors; dams; pressure vessels; pipelines; tunnels. Engineering Structures also publishes review articles, short communications and discussions, book reviews, and a diary on international events related to any aspect of structural engineering.